Electric Valve Pressure Sensing for Low-Cost Flow Control
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Solution Overview
Problem
Existing electric valves in vehicle thermal management systems face challenges in obtaining pressure signals at a low cost, which is essential for improving flow control accuracy of working media.
Innovation Solution
An electric valve with a pressure sensing unit that forms a piezoelectric signal, eliminating the need for a protective cover and packaging structure, integrates this signal with an electric control board and conditioning circuit to control the driving part, thereby reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure sensing unit is added to the electric valve to obtain pressure signals, then flow control accuracy is improved, but device complexity and cost increase due to needing protective covers and packaging structures
Solution Approach 1:
The pressure sensing unit is integrated directly into the valve seat structure, merging the sensing function with the existing valve body. The valve seat is designed with a detection flow passage and sensing cavity that accommodate the pressure sensing unit, eliminating the need for separate protective housings and reducing overall device complexity while maintaining measurement precision
Solution Approach 2:
The valve seat is designed to serve multiple functions: it provides the sealing surface for valve closure, creates flow passages for working medium, and houses the pressure sensing unit. This multi-functionality eliminates the need for dedicated protective structures for the pressure sensor, reducing device complexity while enabling accurate pressure signal acquisition
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for cost-effective pressure signal acquisition and utilization in controlling the electric valve, enhancing flow control accuracy without additional protective measures for the pressure sensing unit.
Implementation Method 1
the pressure sensing unit can sense a pressure characteristic of the working medium in a detection flow passage and form a piezoelectric signal
Data Source
AI summary
An electric valve and a thermal management system. The electric valve comprises a pressure sensing unit. The pressure sensing unit is connected to a valve seat, and the pressure sensing unit can sense the pressure characteristics of a working medium in a detection flow channel) and form a piezoelectric signal. An electric control portion comprises an electric control board. The piezoelectric signal forms, by means of a conditioning circuit, an electrical signal corresponding to a pressure. The electrical signal is used as a part for generating a signal for controlling a driving portion.